Scatterplots

Front

What is a scatterplot?

Back

A scatterplot is a graphical representation that displays the relationship between two quantitative variables, using points to represent individual data points.

Front

What does a trend line in a scatterplot indicate?

Back

A trend line indicates the general direction or pattern of the data points in a scatterplot, helping to visualize the relationship between the variables.

Front

How can you use a trend line to make predictions?

Back

You can use a trend line to make predictions by extending the line to estimate the value of one variable based on the value of another.

Front

What is a positive correlation in a scatterplot?

Back

A positive correlation occurs when an increase in one variable corresponds to an increase in another variable, resulting in a scatterplot that slopes upwards.

Front

What is a negative correlation in a scatterplot?

Back

A negative correlation occurs when an increase in one variable corresponds to a decrease in another variable, resulting in a scatterplot that slopes downwards.

Front

What does it mean if a scatterplot shows no relationship?

Back

If a scatterplot shows no relationship, it means that there is no discernible pattern or correlation between the two variables being analyzed.

Front

How do you interpret the slope of a trend line?

Back

The slope of a trend line indicates the rate of change between the two variables; a steeper slope suggests a stronger relationship.

Front

What is the purpose of using scatterplots in data analysis?

Back

Scatterplots are used to visually assess the relationship between two variables, identify trends, and detect outliers.

Front

What is the significance of outliers in a scatterplot?

Back

Outliers are data points that deviate significantly from the trend of the rest of the data; they can indicate variability or errors in data collection.

Front

How can you determine the strength of a correlation from a scatterplot?

Back

The strength of a correlation can be determined by how closely the data points cluster around the trend line; tighter clustering indicates a stronger correlation.